Gyration
Gyration (ji*rā"shun) , noun
1.
The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution.
The gyrations of an ascending balloon.
If a burning coal be nimbly moved round in a circle, with gyrations continually repeated, the whole circle will appear like fire.
2.
(Zoology) One of the whorls of a spiral univalve shell.
Collocations (2)
Radius of gyration , the distance between the axis of a rotating body and its center of gyration. — Rankine